Maybe, but I'm not positive Sony would agree to a deal that let them go independent again after a few years, and if they own them outright, Sony doesn't seem like it'd let a studio out from under its umbrella.
Not as big a deal as some of the other recent acquisitions IMO. Bungie may have a good MRR as a result of being one of the few to succeed with 'games as a service' but they don't have a wide portfolio of games by any means. They got big with Halo 1-3, and have done alright with Destiny and.... .that's about it.
Nothing compared to the scale of the AB or Bethesda purchases. I don't expect any major developments out of this one for a while.